Project Status: 31 December 2005 (22 UTC)
We are now well into the post-frontal stage of this wet event. Precipitation is still falling in the mountains in a showery mode. Accumulations continue to increase; Blue Canyon has had about 10 inches since 05 UTC 30 December. There are lots of flooding issues throughout the region. Flooding in the lee of the Sierra is perhaps the most severe, with many parts of Reno under water. Also, a debris flow near Floriston (close to the Nevada-California state line) has closed down Interstate-80, perhaps for 2 or more days.
The SMART-R ceased operations at about 20 UTC so that the operator (Ken Howard) could get some rest in advance of the Sunday-Monday precipitation event. There are some hardware issues on the SMART-R data acquistion computer that will need to be addressed before data collection can begin again. This will be addressed first thing Sunday morning.
XPOL ceased operations at about 21 UTC so that the engineer (Kurt Clark) could address some weatherproofing issues on parts of the radar exposed to the elements.
The last supplemental sounding at Oakland was at 21 UTC
The last sounding at the Sloughhouse field site was at 18 UTC, just after the cold front passed the site. Many of the soundings at Sloughhouse experienced a porpoising effect, where ice builds up on the balloon and inhibits ascent. These sondes only rose to about 3 km before descending and slamming into terrain. Attempts will be made to overcome this problem.
IOP 4 will be declared over at 00 UTC 1 January. We anticipate that IOP 5 will begin at 00 UTC 2 January and last about 24 hours. Supplemental soundings at Oakland have been requested at 03, 06, 09, 15, 18 and 21 UTC 2 January. The current plan is for Sloughhouse sounding operations to begin at 00 UTC 2 January (i.e., 3 pm PST 1 January release) and continue through 00 UTC 3 January (i.e., 3 pm PST 2 January release). Subtle adjustments to these plans may be made mid-day Sunday after further guidance is available.